What is the difference between open() and window.open() in Firefox?

Question

In answering my question Pumbaa80 found a difference between calling open() and window.open(), try the following examples in Firefox

Answer 1

In a browser, the default context is window. That's why you can call open(), alert() and even escape() for example. Calling window.open() is exactly equivalent to open().

How a new window opens by the open() function call is entirely dependent on your browser.